pt-online-schema-change使用

MySQL ddl 的问题现状

在运维mysql数据库时，我们总会对数据表进行ddl 变更，修改添加字段或者索引，对于mysql 而已，ddl 显然是一个令所有MySQL dba 诟病的一个功能，因为在MySQL中在对表进行ddl时，会锁表，当表比较小比如小于1w上时，对前端影响较小，当时遇到千万级别的表就会影响前端应用对表的写操作。

工作原理：

1、如果存在外键，根据alter-foreign-keys-method参数的值，检测外键相关的表，做相应设置的处理。没有使用 --alter-foreign-keys-method=rebuild_constraints 指定特定的值，该工具不予执行
2、创建一个和源表表结构一样的临时表(_tablename_new)，执行alter修改临时表表结构。
3、在原表上创建3个于inser delete update对应的触发器. （用于copy 数据的过程中，在原表的更新操作更新到新表.）

4、从原表拷贝数据到临时表，拷贝过程中在原表进行的写操作都会更新到新建的临时表
5、修改外键相关的子表，根据修改后的数据，修改外键关联的子表。
6、rename源数据表为old表，把新表rename为源表名，并将old表删除。
7、删除触发器。

执行条件：

1．操作的表必须有主键或则唯一索引，否则报如下错误。

Cannot chunk the original table `test`.`t_driver_allowance_test`: There is no good index and the table is oversized. at /usr/local/bin/pt-online-schema-change line 5486.

2 . 该表不能定义触发器，否则报如下错误。

The table `taotao`.`tttt` has triggers. This tool needs to create its own triggers, so the table cannot already have triggers.

用法介绍：

pt-online-schema-change --help 查看参数选项

这里有几个参数需要介绍一下：

--dry-run 这个参数不建立触发器，不拷贝数据，也不会替换原表。只是创建和更改新表。

--execute 这个参数的作用和前面工作原理的介绍的一样，会建立触发器，来保证最新变更的数据会影响至新表。注意：如果不加这个参数，这个工具会在执行一些检查后退出。

--critical-load 每次chunk操作前后，会根据show global status统计指定的状态量的变化，默认是统计Thread_running。目的是为了安全，防止原始表上的触发器引起负载过高。这也是为了防止在线DDL对线上的影响。超过设置的阀值，就会终止操作，在线DDL就会中断。提示的异常如上报错信息。

--max-load 选项定义一个阀值，在每次chunk操作后，查看show global status状态值是否高于指定的阀值。该参数接受一个mysql status状态变量以及一个阀值，如果没有给定阀值，则定义一个阀值为为高于当前值的20%。注意这个参数不会像--critical-load终止操作，而只是暂停操作。当status值低于阀值时，则继续往下操作。是暂停还是终止操作这是--max-load和--critical-load的差别。

--charset=utf8连接到MySQL后运行SET NAMES UTF8

--check-replication-filters 检查复制中是否设置了过滤条件，如果设置了，程序将退出

--nocheck-replication-filters 不检查复制中是否设置了过滤条件

--set-vars 设置mysql的变量值

--check-slave-lag 检查主从延迟

例子：

添加字段

pt-online-schema-change -u root -p 123456 --alter='add column vid int ' --execute D=taotao,t=tttt --max-load=Threads_connected:650 --critical-load=Threads_running=550 --charset=utf8 --nocheck-replication-filters --set-vars innodb_lock_wait_timeout=30000

删除字段

pt-online-schema-change -u root -p 123456 --alter='drop column vid ' --execute D=taotao,t=tttt --max-load=Threads_connected:650 --critical-load=Threads_running=550 --charset=utf8 --nocheck-replication-filters --set-vars innodb_lock_wait_timeout=30000

修改字段

pt-online-schema-change -u root -p 123456 --alter='modify column sid bigint(25) ' --execute D=taotao,t=tttt --max-load=Threads_connected:650 --critical-load=Threads_running=550 --charset=utf8 --nocheck-replication-filters --set-vars innodb_lock_wait_timeout=30000

添加索引

pt-online-schema-change -u root -p 123456 --alter=' add key indx_sid(sid) ' --execute D=taotao,t=tttt --max-load=Threads_connected:650 --critical-load=Threads_running=550 --charset=utf8 --nocheck-replication-filters --set-vars innodb_lock_wait_timeout=30000

删除索引

pt-online-schema-change -u root -p 123456 --alter=' drop key indx_sid ' --execute D=taotao,t=tttt --max-load=Threads_connected:650 --critical-load=Threads_running=550 --charset=utf8 --nocheck-replication-filters --set-vars innodb_lock_wait_timeout=30000

pt-online-schema-change --user=dba_user --password=msds007 -S /app/mysqldata/3306/mysql.sock --charset=utf8 --no-check-replication-filters --alter "modify HomeworkID bigint(20) AUTO_INCREMENT" --no-drop-old-table D=test,t=wx_edu_homework --alter-foreign-keys-method=rebuild_constraints --print --execute

考虑从库延迟情况，意味这要注意这几个选项的设置

--max-lag
--check-interval
--recursion-method
--check-slave-lag

流程：

1.判断各种参数

2.根据原表"t",创建一个名称为"_t_new"的新表

3.执行ALTER TABLE语句修改新表"_t_new"

4.创建3个触发器,名称格式为pt_osc_库名_表名_操作类型,比如

CREATE TRIGGER `pt_osc_dba_t_del` AFTER DELETE ON `dba`.`t` FOR EACH ROW DELETE IGNORE FROM `dba`.`_t_new` WHERE `dba`.`_t_new`.`id` <=> OLD.`id`

CREATE TRIGGER `pt_osc_dba_t_upd` AFTER UPDATE ON `dba`.`t` FOR EACH ROW REPLACE INTO `dba`.`_t_new` (`id`, `a`, `b`, `c1`) VALUES (NEW.`id`, NEW.`a`, NEW.`b`, NEW.`c1`)

CREATE TRIGGER `pt_osc_dba_t_ins` AFTER INSERT ON `dba`.`t` FOR EACH ROW REPLACE INTO `dba`.`_t_new` (`id`, `a`, `b`, `c1`) VALUES (NEW.`id`, NEW.`a`, NEW.`b`, NEW.`c1`)

5.开始复制数据,比如

INSERT LOW_PRIORITY IGNORE INTO `dba`.`_t_new` (`id`, `a`, `b`, `c1`) SELECT `id`, `a`, `b`, `c1` FROM `dba`.`t` LOCK IN SHARE MODE /*pt-online-schema-change 28014 copy table*/

注意：对原表加共享锁，会阻塞所有排他锁

6.复制完成后,交互原表和新表,执行RENAME命令,如 RENAME TABLE t to _t_old, _t_new to t;

7.删除老表,_t_old

8.删除触发器

9.修改完成

注意：如果异常终止程序，触发器不会自动删除，如果要删除新表，那么要先删除触发器，否则向老表插入数据会因为找不到新表而报错

注意事项：

pt-online-schema-change 在线DDL工具，虽然说不会锁表，但是对性能还是有一定的影响，执行过程中对全表做一次select。这个过程会将buffer_cache中活跃数据全部交换一遍，这就导致活跃数据的请求都要从磁盘获取，导致慢SQL增多，file_reads增大。所以对于大表应在业务低峰期执行该操作
执行 RENAME 时，你不能有任何锁定的表或活动的事务。你同样也必须有对原初表的 ALTER 和 DROP 权限，以及对新表的 CREATE 和 INSERT 权限。当业务量较大时，修改操作会等待没有数据修改后，执行最后的rename操作。因此，在修改表结构时，应该尽量选择在业务相对空闲时，至少修改表上的数据操作较低时，执行较为妥当。如果在多表更名中，MySQL 遭遇到任何错误，它将对所有被更名的表进行倒退更名，将每件事物退回到最初状态。
对表的慢查询操作，慢查询还未结束执行osc操作，会报错，超时错误，在创建触发器的时候退出。
对于主从复制架构。考虑到主从的一致性，应该在主库上执行pt-online-schema-change操作。

ps：如果在误在从库上执行了pt-online-schema-change操作，未执行完成不要取消，等到执行完成了，在修改成原来的状态。

如果在误在从库上执行了pt-online-schema-change操作，未执行完成取消的话，删除有 pt-online-schema-change在从库上创建的临时表和触发器即可。

####################################################################

在原表上建立三个触发器，如下：
（1）CREATETRIGGER mk_osc_del AFTER DELETE ON $table ” “FOR EACH ROW ”
“DELETE IGNORE FROM $new_table “”WHERE$new_table.$chunk_column = OLD.$chunk_column”;
（2）CREATETRIGGER mk_osc_ins AFTER INSERT ON $table ” “FOR EACH ROW ”
“REPLACEINTO $new_table ($columns) ” “VALUES($new_values)”;
（3）CREATETRIGGER mk_osc_upd AFTER UPDATE ON $table ” “FOR EACH ROW ”
“REPLACE INTO $new_table ($columns) “”VALUES ($new_values)”;

我们可以看到这三个触发器分别对应于INSERT、UPDATE、DELETE三种操作：
（1）mk_osc_del，DELETE操作，我们注意到DELETEIGNORE，当新有数据时，我们才进行操作，也就是说，当在后续导入过程中，如果删除的这个数据还未导入到新表，那么我们可以不在新表执行操作，因为在以后的导入过程中，原表中改行数据已经被删除，已经没有数据，那么他也就不会导入到新表中；
（2）mk_osc_ins，INSERT操作，所有的INSERT INTO全部转换为REPLACEINTO，为了确保数据的一致性，当有新数据插入到原表时，如果触发器还未把原表数据未同步到新表，这条数据已经被导入到新表了，那么我们就可以利用replaceinto进行覆盖，这样数据也是一致的
（3）mk_osc_upd UPDATE操作，所有的UPDATE也转换为REPLACEINTO，因为当跟新的数据的行还未同步到新表时，新表是不存在这条记录的，那么我们就只能插入该条数据，如果已经同步到新表了，那么也可以进行覆盖插入，所有数据与原表也是一致的；
我们也能看出上述的精髓也就这这几条replaceinto操作，正是因为这几条replaceinto才能保证数据的一致性
4、拷贝原表数据到临时表中，在脚本中使用如下语句
INSERT IGNORE INTO $to_table ($columns) ” “SELECT $columns FROM $from_table “”WHERE ($chunks->[$chunkno])”，我们能看到他是通过一些查询（基本为主键、唯一键值）分批把数据导入到新的表中，在导入前，我们能通过参数–chunk-size对每次导入行数进行控制，已减少对原表的锁定时间，并且在导入时，我们能通过—sleep参数控制，在每个chunk导入后与下一次chunk导入开始前sleep一会，sleep时间越长，对于磁盘IO的冲击就越小
5、Rename 原表到old表中，在把临时表Rename为原表，
“RENAME TABLE `$db`.`$tmp_tbl`TO `$db`.`$tbl`”; 在rename过程，其实我们还是会导致写入读取堵塞的，所以从严格意思上说，我们的OSC也不是对线上环境没有一点影响，但由于rename操作只是一个修改名字的过程，也只会修改一些表的信息，基本是瞬间结束，故对线上影响不太大
6、清理以上过程中的不再使用的数据，如OLD表。

pt-online-schema-change --user=bluewhale --password=bluewhale001 -S /tmp/mysqld.3313_sslog.sock --charset=utf8 --no-check-replication-filters --alter "modify id bigint(20) AUTO_INCREMENT" --no-drop-old-table D=susuan,t=edu_user_vip_log --alter-foreign-keys-method=rebuild_constraints --print --execute --max-lag=1s --check-interval=10s

[root@zsyx-wlzj-dbbakrescs8 ~]# pt-online-schema-change --user=bluewhale --password=bluewhale001 -S /tmp/mysqld.3313_sslog.sock --charset=utf8 --no-check-replicatiINCREMENT" --no-drop-old-table D=susuan,t=edu_user_vip_log --alter-foreign-keys-method=rebuild_constraints --print --execute --max-lag=1s --check-interval=10s

No slaves found. See --recursion-method if host zsyx-wlzj-dbbakrescs8 has slaves.

Not checking slave lag because no slaves were found and --check-slave-lag was not specified.

# A software update is available:

# * The current version for Percona::Toolkit is 3.0.5

Operation, tries, wait:

copy_rows, 10, 0.25

create_triggers, 10, 1

drop_triggers, 10, 1

swap_tables, 10, 1

update_foreign_keys, 10, 1

No foreign keys reference `susuan`.`edu_user_vip_log`; ignoring --alter-foreign-keys-method.

Altering `susuan`.`edu_user_vip_log`...

Creating new table...

CREATE TABLE `susuan`.`_edu_user_vip_log_new` (

`id` int(10) unsigned NOT NULL AUTO_INCREMENT,

`vip_id` int(10) unsigned DEFAULT '0',

`user_id` int(10) unsigned DEFAULT '0',

`create_time` datetime DEFAULT '1970-01-01 00:00:00',

`duration` int(11) DEFAULT '0',

`type` tinyint(4) DEFAULT '1',

`description` varchar(255) DEFAULT '',

`open_id` varchar(50) DEFAULT NULL COMMENT '微信openid',

PRIMARY KEY (`id`),

KEY `user_id_key` (`user_id`),

KEY `create_time_key` (`create_time`),

KEY `vip_log_index_open_id` (`open_id`) USING BTREE

) ENGINE=InnoDB AUTO_INCREMENT=11719633 DEFAULT CHARSET=utf8

Created new table susuan._edu_user_vip_log_new OK.

Altering new table...

ALTER TABLE `susuan`.`_edu_user_vip_log_new` modify id bigint(20) AUTO_INCREMENT

Altered `susuan`.`_edu_user_vip_log_new` OK.

2018-09-17T20:16:02 Creating triggers...

CREATE TRIGGER `pt_osc_susuan_edu_user_vip_log_del` AFTER DELETE ON `susuan`.`edu_user_vip_log` FOR EACH ROW DELETE IGNORE FROM `susuan`.`_edu_user_vip_log_new` WHERE `susuan`.`_edu_user_vip_log_new`.`id` <=> OLD.`id`

CREATE TRIGGER `pt_osc_susuan_edu_user_vip_log_upd` AFTER UPDATE ON `susuan`.`edu_user_vip_log` FOR EACH ROW REPLACE INTO `susuan`.`_edu_user_vip_log_new` (`id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id`) VALUES (NEW.`id`, NEW.`vip_id`, NEW.`user_id`, NEW.`create_time`, NEW.`duration`, NEW.`type`, NEW.`description`, NEW.`open_id`)

CREATE TRIGGER `pt_osc_susuan_edu_user_vip_log_ins` AFTER INSERT ON `susuan`.`edu_user_vip_log` FOR EACH ROW REPLACE INTO `susuan`.`_edu_user_vip_log_new` (`id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id`) VALUES (NEW.`id`, NEW.`vip_id`, NEW.`user_id`, NEW.`create_time`, NEW.`duration`, NEW.`type`, NEW.`description`, NEW.`open_id`)

2018-09-17T20:16:02 Created triggers OK.

2018-09-17T20:16:02 Copying approximately 7125398 rows...

INSERT LOW_PRIORITY IGNORE INTO `susuan`.`_edu_user_vip_log_new` (`id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id`) SELECT `id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= ?)) AND ((`id` <= ?)) LOCK IN SHARE MODE /*pt-online-schema-change 10551 copy nibble*/

SELECT /*!40001 SQL_NO_CACHE */ `id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= ?)) ORDER BY `id` LIMIT ?, 2 /*next chunk boundary*/

Copying `susuan`.`edu_user_vip_log`: 30% 01:08 remain

Copying `susuan`.`edu_user_vip_log`: 58% 00:43 remain

Copying `susuan`.`edu_user_vip_log`: 78% 00:24 remain

2018-09-17T20:19:01 Copied rows OK.

2018-09-17T20:19:01 Swapping tables...

RENAME TABLE `susuan`.`edu_user_vip_log` TO `susuan`.`_edu_user_vip_log_old`, `susuan`.`_edu_user_vip_log_new` TO `susuan`.`edu_user_vip_log`

2018-09-17T20:19:01 Swapped original and new tables OK.

Not dropping old table because --no-drop-old-table was specified.

2018-09-17T20:19:01 Dropping triggers...

DROP TRIGGER IF EXISTS `susuan`.`pt_osc_susuan_edu_user_vip_log_del`;

DROP TRIGGER IF EXISTS `susuan`.`pt_osc_susuan_edu_user_vip_log_upd`;

DROP TRIGGER IF EXISTS `susuan`.`pt_osc_susuan_edu_user_vip_log_ins`;

2018-09-17T20:19:01 Dropped triggers OK.

Successfully altered `susuan`.`edu_user_vip_log`.

[root@zsyx-wlzj-dbbakrescs8 ~]# cat /data/mysql_3313_sslog/data/zsyx-wlzj-dbbakrescs8.log

/usr/local/mysql/bin/mysqld, Version: 5.6.25-log (Source distribution). started with:

Tcp port: 3313 Unix socket: /tmp/mysqld.3313_sslog.sock

Time Id Command Argument

180917 20:15:59 11 Connect bluewhale@localhost on susuan

11 Query SELECT @@SQL_MODE

11 Query /*!40101 SET NAMES "utf8"*/

11 Query SHOW VARIABLES LIKE 'innodb\_lock_wait_timeout'

11 Query SET SESSION innodb_lock_wait_timeout=1

11 Query SHOW VARIABLES LIKE 'lock\_wait_timeout'

11 Query SET SESSION lock_wait_timeout=60

11 Query SHOW VARIABLES LIKE 'wait\_timeout'

11 Query SET SESSION wait_timeout=10000

11 Query SET @@SQL_QUOTE_SHOW_CREATE = 1/*!40101, @@SQL_MODE='NO_AUTO_VALUE_ON_ZERO,NO_ENGINE_SUBSTITUTION'*/

11 Query SELECT @@server_id /*!50038 , @@hostname*/

12 Connect bluewhale@localhost on susuan

12 Query SELECT @@SQL_MODE

12 Query /*!40101 SET NAMES "utf8"*/

12 Query SHOW VARIABLES LIKE 'innodb\_lock_wait_timeout'

12 Query SET SESSION innodb_lock_wait_timeout=1

12 Query SHOW VARIABLES LIKE 'lock\_wait_timeout'

12 Query SET SESSION lock_wait_timeout=60

12 Query SHOW VARIABLES LIKE 'wait\_timeout'

12 Query SET SESSION wait_timeout=10000

12 Query SET @@SQL_QUOTE_SHOW_CREATE = 1/*!40101, @@SQL_MODE='NO_AUTO_VALUE_ON_ZERO,NO_ENGINE_SUBSTITUTION'*/

12 Query SELECT @@server_id /*!50038 , @@hostname*/

11 Query SHOW VARIABLES LIKE 'wsrep_on'

11 Query SHOW VARIABLES LIKE 'version%'

11 Query SHOW ENGINES

11 Query SHOW VARIABLES LIKE 'innodb_version'

11 Query SELECT @@SERVER_ID

11 Query SHOW GRANTS FOR CURRENT_USER()

11 Query SHOW PROCESSLIST

11 Query SHOW SLAVE HOSTS

11 Query SHOW GLOBAL STATUS LIKE 'Threads_running'

11 Query SELECT CONCAT(@@hostname, @@port)

180917 20:16:00 11 Query SHOW VARIABLES

180917 20:16:02 11 Query SHOW TABLES FROM `susuan` LIKE 'edu\_user\_vip\_log'

11 Query SHOW TRIGGERS FROM `susuan` LIKE 'edu\_user\_vip\_log'

11 Query /*!40101 SET @OLD_SQL_MODE := @@SQL_MODE, @@SQL_MODE := '', @OLD_QUOTE := @@SQL_QUOTE_SHOW_CREATE, @@SQL_QUOTE_SHOW_CREATE := 1 */

11 Query USE `susuan`

11 Query SHOW CREATE TABLE `susuan`.`edu_user_vip_log`

11 Query /*!40101 SET @@SQL_MODE := @OLD_SQL_MODE, @@SQL_QUOTE_SHOW_CREATE := @OLD_QUOTE */

11 Query EXPLAIN SELECT * FROM `susuan`.`edu_user_vip_log` WHERE 1=1

11 Query SELECT table_schema, table_name FROM information_schema.key_column_usage WHERE referenced_table_schema='susuan' AND referenced_table_name='edu_user_vip_log'

11 Query SHOW VARIABLES LIKE 'wsrep_on'

11 Query /*!40101 SET @OLD_SQL_MODE := @@SQL_MODE, @@SQL_MODE := '', @OLD_QUOTE := @@SQL_QUOTE_SHOW_CREATE, @@SQL_QUOTE_SHOW_CREATE := 1 */

11 Query USE `susuan`

11 Query SHOW CREATE TABLE `susuan`.`edu_user_vip_log`

11 Query /*!40101 SET @@SQL_MODE := @OLD_SQL_MODE, @@SQL_QUOTE_SHOW_CREATE := @OLD_QUOTE */

11 Query CREATE TABLE `susuan`.`_edu_user_vip_log_new` (

`id` int(10) unsigned NOT NULL AUTO_INCREMENT,

`vip_id` int(10) unsigned DEFAULT '0',

`user_id` int(10) unsigned DEFAULT '0',

`create_time` datetime DEFAULT '1970-01-01 00:00:00',

`duration` int(11) DEFAULT '0',

`type` tinyint(4) DEFAULT '1',

`description` varchar(255) DEFAULT '',

`open_id` varchar(50) DEFAULT NULL COMMENT '微信openid',

PRIMARY KEY (`id`),

KEY `user_id_key` (`user_id`),

KEY `create_time_key` (`create_time`),

KEY `vip_log_index_open_id` (`open_id`) USING BTREE

) ENGINE=InnoDB AUTO_INCREMENT=11719633 DEFAULT CHARSET=utf8

11 Query ALTER TABLE `susuan`.`_edu_user_vip_log_new` modify id bigint(20) AUTO_INCREMENT

11 Query /*!40101 SET @OLD_SQL_MODE := @@SQL_MODE, @@SQL_MODE := '', @OLD_QUOTE := @@SQL_QUOTE_SHOW_CREATE, @@SQL_QUOTE_SHOW_CREATE := 1 */

11 Query USE `susuan`

11 Query SHOW CREATE TABLE `susuan`.`_edu_user_vip_log_new`

11 Query /*!40101 SET @@SQL_MODE := @OLD_SQL_MODE, @@SQL_QUOTE_SHOW_CREATE := @OLD_QUOTE */

11 Query CREATE TRIGGER `pt_osc_susuan_edu_user_vip_log_del` AFTER DELETE ON `susuan`.`edu_user_vip_log` FOR EACH ROW DELETE IGNORE FROM `susuan`.`_edu_user_vip_log_new` WHERE `susuan`.`_edu_user_vip_log_new`.`id` <=> OLD.`id`

11 Query CREATE TRIGGER `pt_osc_susuan_edu_user_vip_log_upd` AFTER UPDATE ON `susuan`.`edu_user_vip_log` FOR EACH ROW REPLACE INTO `susuan`.`_edu_user_vip_log_new` (`id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id`) VALUES (NEW.`id`, NEW.`vip_id`, NEW.`user_id`, NEW.`create_time`, NEW.`duration`, NEW.`type`, NEW.`description`, NEW.`open_id`)

11 Query CREATE TRIGGER `pt_osc_susuan_edu_user_vip_log_ins` AFTER INSERT ON `susuan`.`edu_user_vip_log` FOR EACH ROW REPLACE INTO `susuan`.`_edu_user_vip_log_new` (`id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id`) VALUES (NEW.`id`, NEW.`vip_id`, NEW.`user_id`, NEW.`create_time`, NEW.`duration`, NEW.`type`, NEW.`description`, NEW.`open_id`)

11 Query EXPLAIN SELECT * FROM `susuan`.`edu_user_vip_log` WHERE 1=1

11 Query SELECT /*!40001 SQL_NO_CACHE */ `id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) ORDER BY `id` LIMIT 1 /*first lower boundary*/

11 Query SELECT /*!40001 SQL_NO_CACHE */ `id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX (`PRIMARY`) WHERE `id` IS NOT NULL ORDER BY `id` LIMIT 1 /*key_len*/

11 Query EXPLAIN SELECT /*!40001 SQL_NO_CACHE */ * FROM `susuan`.`edu_user_vip_log` FORCE INDEX (`PRIMARY`) WHERE `id` >= '1' /*key_len*/

11 Query EXPLAIN SELECT /*!40001 SQL_NO_CACHE */ `id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '1')) ORDER BY `id` LIMIT 999, 2 /*next chunk boundary*/

11 Query SELECT /*!40001 SQL_NO_CACHE */ `id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '1')) ORDER BY `id` LIMIT 999, 2 /*next chunk boundary*/

11 Query EXPLAIN SELECT `id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '1')) AND ((`id` <= '1028')) LOCK IN SHARE MODE /*explain pt-online-schema-change 10551 copy nibble*/

11 Query INSERT LOW_PRIORITY IGNORE INTO `susuan`.`_edu_user_vip_log_new` (`id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id`) SELECT `id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '1')) AND ((`id` <= '1028')) LOCK IN SHARE MODE /*pt-online-schema-change 10551 copy nibble*/

11 Query SHOW WARNINGS

11 Query SHOW GLOBAL STATUS LIKE 'Threads_running'

11 Query EXPLAIN SELECT /*!40001 SQL_NO_CACHE */ `id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '1029')) ORDER BY `id` LIMIT 9256, 2 /*next chunk boundary*/

11 Query SELECT /*!40001 SQL_NO_CACHE */ `id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '1029')) ORDER BY `id` LIMIT 9256, 2 /*next chunk boundary*/

180917 20:16:03 11 Query EXPLAIN SELECT `id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '1029')) AND ((`id` <= '10304')) LOCK IN SHARE MODE /*explain pt-online-schema-change 10551 copy nibble*/

11 Query INSERT LOW_PRIORITY IGNORE INTO `susuan`.`_edu_user_vip_log_new` (`id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id`) SELECT `id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '1029')) AND ((`id` <= '10304')) LOCK IN SHARE MODE /*pt-online-schema-change 10551 copy nibble*/

11 Query SHOW WARNINGS

11 Query SHOW GLOBAL STATUS LIKE 'Threads_running'

11 Query EXPLAIN SELECT /*!40001 SQL_NO_CACHE */ `id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '10305')) ORDER BY `id` LIMIT 27846, 2 /*next chunk boundary*/

11 Query SELECT /*!40001 SQL_NO_CACHE */ `id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '10305')) ORDER BY `id` LIMIT 27846, 2 /*next chunk boundary*/

11 Query EXPLAIN SELECT `id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '10305')) AND ((`id` <= '38151')) LOCK IN SHARE MODE /*explain pt-online-schema-change 10551 copy nibble*/

11 Query INSERT LOW_PRIORITY IGNORE INTO `susuan`.`_edu_user_vip_log_new` (`id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id`) SELECT `id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '10305')) AND ((`id` <= '38151')) LOCK IN SHARE MODE /*pt-online-schema-change 10551 copy nibble*/

180917 20:16:04 11 Query SHOW WARNINGS

11 Query SHOW GLOBAL STATUS LIKE 'Threads_running'

11 Query EXPLAIN SELECT /*!40001 SQL_NO_CACHE */ `id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '38152')) ORDER BY `id` LIMIT 15478, 2 /*next chunk boundary*/

11 Query SELECT /*!40001 SQL_NO_CACHE */ `id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '38152')) ORDER BY `id` LIMIT 15478, 2 /*next chunk boundary*/

11 Query EXPLAIN SELECT `id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '38152')) AND ((`id` <= '53630')) LOCK IN SHARE MODE /*explain pt-online-schema-change 10551 copy nibble*/

11 Query INSERT LOW_PRIORITY IGNORE INTO `susuan`.`_edu_user_vip_log_new` (`id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id`) SELECT `id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '38152')) AND ((`id` <= '53630')) LOCK IN SHARE MODE /*pt-online-schema-change 10551 copy nibble*/

11 Query SHOW WARNINGS

11 Query SHOW GLOBAL STATUS LIKE 'Threads_running'

11 Query EXPLAIN SELECT /*!40001 SQL_NO_CACHE */ `id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '53631')) ORDER BY `id` LIMIT 20777, 2 /*next chunk boundary*/

11 Query SELECT /*!40001 SQL_NO_CACHE */ `id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '53631')) ORDER BY `id` LIMIT 20777, 2 /*next chunk boundary*/

11 Query EXPLAIN SELECT `id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '53631')) AND ((`id` <= '74408')) LOCK IN SHARE MODE /*explain pt-online-schema-change 10551 copy nibble*/

11 Query INSERT LOW_PRIORITY IGNORE INTO `susuan`.`_edu_user_vip_log_new` (`id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id`) SELECT `id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '53631')) AND ((`id` <= '74408')) LOCK IN SHARE MODE /*pt-online-schema-change 10551 copy nibble*/

11 Query SHOW WARNINGS

11 Query SHOW GLOBAL STATUS LIKE 'Threads_running'

11 Query EXPLAIN SELECT /*!40001 SQL_NO_CACHE */ `id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '74409')) ORDER BY `id` LIMIT 27015, 2 /*next chunk boundary*/

11 Query SELECT /*!40001 SQL_NO_CACHE */ `id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '74409')) ORDER BY `id` LIMIT 27015, 2 /*next chunk boundary*/

11 Query EXPLAIN SELECT `id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '74409')) AND ((`id` <= '101424')) LOCK IN SHARE MODE /*explain pt-online-schema-change 10551 copy nibble*/

11 Query INSERT LOW_PRIORITY IGNORE INTO `susuan`.`_edu_user_vip_log_new` (`id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id`) SELECT `id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '74409')) AND ((`id` <= '101424')) LOCK IN SHARE MODE /*pt-online-schema-change 10551 copy nibble*/

11 Query SHOW WARNINGS

11 Query SHOW GLOBAL STATUS LIKE 'Threads_running'

11 Query EXPLAIN SELECT /*!40001 SQL_NO_CACHE */ `id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '101425')) ORDER BY `id` LIMIT 32911, 2 /*next chunk boundary*/

11 Query SELECT /*!40001 SQL_NO_CACHE */ `id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '101425')) ORDER BY `id` LIMIT 32911, 2 /*next chunk boundary*/

11 Query EXPLAIN SELECT `id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '101425')) AND ((`id` <= '134336')) LOCK IN SHARE MODE /*explain pt-online-schema-change 10551 copy nibble*/

11 Query INSERT LOW_PRIORITY IGNORE INTO `susuan`.`_edu_user_vip_log_new` (`id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id`) SELECT `id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '101425')) AND ((`id` <= '134336')) LOCK IN SHARE MODE /*pt-online-schema-change 10551 copy nibble*/

.................

180917 20:19:00 11 Query SHOW WARNINGS

11 Query SHOW GLOBAL STATUS LIKE 'Threads_running'

11 Query EXPLAIN SELECT /*!40001 SQL_NO_CACHE */ `id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '11572375')) ORDER BY `id` LIMIT 42715, 2 /*next chunk boundary*/

11 Query SELECT /*!40001 SQL_NO_CACHE */ `id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '11572375')) ORDER BY `id` LIMIT 42715, 2 /*next chunk boundary*/

11 Query EXPLAIN SELECT `id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '11572375')) AND ((`id` <= '11615090')) LOCK IN SHARE MODE /*explain pt-online-schema-change 10551 copy nibble*/

11 Query INSERT LOW_PRIORITY IGNORE INTO `susuan`.`_edu_user_vip_log_new` (`id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id`) SELECT `id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '11572375')) AND ((`id` <= '11615090')) LOCK IN SHARE MODE /*pt-online-schema-change 10551 copy nibble*/

11 Query SHOW WARNINGS

11 Query SHOW GLOBAL STATUS LIKE 'Threads_running'

11 Query EXPLAIN SELECT /*!40001 SQL_NO_CACHE */ `id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '11615091')) ORDER BY `id` LIMIT 43378, 2 /*next chunk boundary*/

11 Query SELECT /*!40001 SQL_NO_CACHE */ `id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '11615091')) ORDER BY `id` LIMIT 43378, 2 /*next chunk boundary*/

11 Query EXPLAIN SELECT `id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '11615091')) AND ((`id` <= '11658469')) LOCK IN SHARE MODE /*explain pt-online-schema-change 10551 copy nibble*/

11 Query INSERT LOW_PRIORITY IGNORE INTO `susuan`.`_edu_user_vip_log_new` (`id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id`) SELECT `id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '11615091')) AND ((`id` <= '11658469')) LOCK IN SHARE MODE /*pt-online-schema-change 10551 copy nibble*/

180917 20:19:01 11 Query SHOW WARNINGS

11 Query SHOW GLOBAL STATUS LIKE 'Threads_running'

11 Query EXPLAIN SELECT /*!40001 SQL_NO_CACHE */ `id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '11658470')) ORDER BY `id` LIMIT 42505, 2 /*next chunk boundary*/

11 Query SELECT /*!40001 SQL_NO_CACHE */ `id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '11658470')) ORDER BY `id` LIMIT 42505, 2 /*next chunk boundary*/

11 Query EXPLAIN SELECT `id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '11658470')) AND ((`id` <= '11700975')) LOCK IN SHARE MODE /*explain pt-online-schema-change 10551 copy nibble*/

11 Query INSERT LOW_PRIORITY IGNORE INTO `susuan`.`_edu_user_vip_log_new` (`id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id`) SELECT `id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '11658470')) AND ((`id` <= '11700975')) LOCK IN SHARE MODE /*pt-online-schema-change 10551 copy nibble*/

11 Query SHOW WARNINGS

11 Query SHOW GLOBAL STATUS LIKE 'Threads_running'

11 Query EXPLAIN SELECT /*!40001 SQL_NO_CACHE */ `id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '11700976')) ORDER BY `id` LIMIT 43373, 2 /*next chunk boundary*/

11 Query SELECT /*!40001 SQL_NO_CACHE */ `id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '11700976')) ORDER BY `id` LIMIT 43373, 2 /*next chunk boundary*/

11 Query SELECT /*!40001 SQL_NO_CACHE */ `id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) ORDER BY `id` DESC LIMIT 1 /*last upper boundary*/

11 Query EXPLAIN SELECT `id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '11700976')) AND ((`id` <= '11719632')) LOCK IN SHARE MODE /*explain pt-online-schema-change 10551 copy nibble*/

11 Query INSERT LOW_PRIORITY IGNORE INTO `susuan`.`_edu_user_vip_log_new` (`id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id`) SELECT `id`, `vip_id`, `user_id`, `create_time`, `duration`, `type`, `description`, `open_id` FROM `susuan`.`edu_user_vip_log` FORCE INDEX(`PRIMARY`) WHERE ((`id` >= '11700976')) AND ((`id` <= '11719632')) LOCK IN SHARE MODE /*pt-online-schema-change 10551 copy nibble*/

11 Query SHOW WARNINGS

11 Query SHOW GLOBAL STATUS LIKE 'Threads_running'

11 Query RENAME TABLE `susuan`.`edu_user_vip_log` TO `susuan`.`_edu_user_vip_log_old`, `susuan`.`_edu_user_vip_log_new` TO `susuan`.`edu_user_vip_log`

11 Query DROP TRIGGER IF EXISTS `susuan`.`pt_osc_susuan_edu_user_vip_log_del`

11 Query DROP TRIGGER IF EXISTS `susuan`.`pt_osc_susuan_edu_user_vip_log_upd`

11 Query DROP TRIGGER IF EXISTS `susuan`.`pt_osc_susuan_edu_user_vip_log_ins`

11 Query SHOW TABLES FROM `susuan` LIKE '\_edu\_user\_vip\_log\_new'

12 Quit

11 Quit